What car is better: an Infiniti M or an Infiniti G37?

Basically, the M is larger (5 series size) than the G37 and has a V-8 as an option. The G37 is smaller (3 series size) but has a larger V-6 engine (328 hp [or 330 hp if u take the coupe] to 303 hp). I think the G37 is better.